tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
1
fork

Configure Feed

Select the types of activity you want to include in your feed.

Revert "mm/memory.c: share the i_mmap_rwsem"

This reverts commit c8475d144abb1e62958cc5ec281d2a9e161c1946.

There are several[1][2] of bug reports which points to this commit as potential
cause[3].

Let's revert it until we figure out what's going on.

[1] https://lkml.org/lkml/2014/11/14/342
[2] https://lkml.org/lkml/2014/12/22/213
[3] https://lkml.org/lkml/2014/12/9/741

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Cc: Hugh Dickins <hughd@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

authored by

Kirill A. Shutemov and committed by
Linus Torvalds 48ec833b 97bf6af1

+2 -2
+2 -2
mm/memory.c
··· 2378 2378 details.last_index = ULONG_MAX; 2379 2379 2380 2380 2381 - i_mmap_lock_read(mapping); 2381 + i_mmap_lock_write(mapping); 2382 2382 if (unlikely(!RB_EMPTY_ROOT(&mapping->i_mmap))) 2383 2383 unmap_mapping_range_tree(&mapping->i_mmap, &details); 2384 2384 if (unlikely(!list_empty(&mapping->i_mmap_nonlinear))) 2385 2385 unmap_mapping_range_list(&mapping->i_mmap_nonlinear, &details); 2386 - i_mmap_unlock_read(mapping); 2386 + i_mmap_unlock_write(mapping); 2387 2387 } 2388 2388 EXPORT_SYMBOL(unmap_mapping_range); 2389 2389